ratio n. (pl. ratios) 1.比,比率,比值;比例;系数。 2.【经济学】复本位制中金银的法定比价。 the ratio 3:2 (读作 the ratio of three to two )3对2之比。 arithmetical ratio 公差,算术比。 direct ratio 正比。 inverse [reciprocal] ratio反比。 current ratio 电流比,电流变换系数。 nutritive ratio 营养率。 vt. 1.用比例方式表达;求出…的比值;使…成比例。 2.将(相片)按比例放大或缩小。
The solution formula of dwell time is deduced by using the pulse iteration method and the smoothing fourier transition method , and the formula can be simplified referring to workpiece shape . according to the anastomotic status of the tool and workpiece surface , we present the new model of the inherent relation among local pressure density , removal rate , convergence ratio and residual errors , and the corresponding formulas are given . the forming cause of the edge effect in the polishing process is analyzed , and the means which reduces the edge effect is put forward 2 、针对计算机控制光学表面成形( ccos )的加工方式、误差收敛特点,研制了去除函数呈高斯分布的双转子结构研抛模;采用脉冲迭代法、平滑因子傅立叶变换法推导出驻留时间的算法,求解过程中根据工件面形的特点作了各种形式的简化;提出了工件表面和研抛模的吻合误差与局部压强、材料去除率、收敛比之间内在关系的数学模型,并推导出相应的计算公式;分析了边缘效应产生的原因,在加工过程中采用相对压力因子对去除函数进行修正,可以消除边缘效应的影响。